Electric furnace member and process of making it.



No Drawing.

UNITED STATES PATENT OFFICE.

FREDERICK M. BECKET, OE NIAGARA FALLS, NEW YORK, ASSIGNOR TO ELECTROMETALLURGICAL COMPANY, OFNIAGARA FALLS, NEW YORK, A CORPORATION OF WESTVIRGINIA.

ELECTRIC FURNACE MEMBER AND PROCESS OF MAKING IT.

Specification of Letters Patent.

Patented Jan. 7 1913.

Application filed October 12,1911. Serial 110,654,414.

To all whom it may concern:

Be it known that I, FREDERICK M. BECKET, a subject of the King of GreatBritain, residing at Niagara Falls, in the county of Niagara and Stateof New York, have invented certain new and useful Im rovements inElectric Furnace Members an Processes of Making Them, of which thefollowing is a specification.

This invention relates to a compound article for use as a lining, wall,electrode or resistor of an electric furnace, comprising a body ofcarbon and an adherent facing of tungsten or a tungsten alloy,preferably a ferro-alloy high in tungsten, e. 9., one containing 80 percent. or upward. For the production of such article, a block or plate ofcarbon, such as graphite, may be caused to superficially react onatungsten com-' pound reducible by carbon. For example, a tungsten orecontaining iron is heated to the point of fusion, a flux being added ifdesired, and a portion or all of the block to be coated is thensubmerged in the molten bath, whereupon the surficial portion of theblock effects reduction of the ore and is replaced by an adherentcoating of ferrotungsten.

A bar or block of graphite, for example one of the electrodes of afurnace, may be lowered into a molten bath containing a tungstencompound and a reducing agent, whereupon a layer of reduced tungsten orferrotungsten is deposited on it, the initial coating being reinforcedby metal reduced from the bath, and attaining a final thicknessdependent on the temperature of the bar and bath. By cooling the bar orelectrode, as by using a water-cooled terminal head, and by using asuitable current density, a thick layer of tungsten or ferrotungsten maybe provided. Or the tungsten or its alloy may be electrodeposited upon acarbon electrode by constituting it the oathode of a molten electrolytecontaining a tungsten compound.

I claim:

1. An electric furnace member, comprising a body of carbon and anadherent coating consisting essentially of tungsten.

2. An electric furnace member, comprising a body of carbon and anadherent coating of ferrotungsten.

3. The process of making a composite furnace member comprising a body ofcarbon and a coating consisting essentially of tungsten, which consistsin causing the body to superficially react on a tungsten compoundreducible by carbon.

4. The process of making a composite furnace member comprising a body ofcarbon and an adherent coating of ferrotungsten,

which consists in bringing the body in contact with a fused mixture ofcompounds of tungsten and iron reducible by carbon.

5. The process of coating a body with a layer of tungsten or a tungstenalloy, which consists in depositing the metal or alloy on said body froma molten bath, and simultaneously cooling the body.

6. The process of coating a body with a layer of a metal or alloy, whichconsists in depositing the metal or alloy on said body from a moltenbath, and simultaneously cooling the body.

In testimony whereof, I aflix my signature in presence of two witnesses.

FREDERICK M. BEOKET.

Witnesses:

EUGENE A. BYnNEs, CHARLES H. Pormn.

